This article contains spoilers for "Star Wars" #13.
Back in 1977, George Lucas made a very specific promise during one very specific scene of "Star Wars." While playing holochess during the Millennium Falcon's trip to Alderaan, R2-D2 made a move that upset his opponent, Chewbacca. After C-3PO told Chewbacca to stop whining, Han Solo gave the protocol droid a warning, saying that people don't worry about upsetting droids because "droids don't pull people's arms out of their sockets when they lose. Wookiees are known to do that."
But even if Wookiees were known for pulling arms out of their sockets, we never once saw Chewbacca do that in any Star Wars film. Was Han Solo just bluffing? Was he building up Chewie's reputation to intimidate an annoying droid? As revealed today by writer Jason Aaron and artist Mike Deodato in "Star Wars" #13, it turns out Han Solo was telling the truth.
With Luke Skywalker held hostage by Darth Vader's associate Doctor Aphra and her killer droids Triple Zero and Beetee, Chewbacca took advantage of Han Solo's distraction to get close enough to the bad guys to do this...
That's a Wookiee pulling an arm out of its socket -- specifically the arm of a protocol droid. Aaron and Deodato weren't content to keep the callback to just that one page, though. When the story returns to Chewie's attack, he's doing something even more awesome than ripping an arm out of a socket.
Turns out Han Solo doesn't exaggerate when it comes to a Wookiee's temper. "Star Wars" #13, part three of the "Vader Down" storyline, is on sale now.